<template>
  <div>
    <h2>随机点名</h2>
    <div class="box">
      <span>名字是：</span>
      <div class="qs">{{word}}</div>
    </div>
    <div class="btns">
      <button class="start" @click="startFn">开始</button>
      <button class="end" @click="endFn">结束</button>
    </div>
  </div>
</template>
<script>
export default {
  data(){return {
      word:"这里显示姓名",
      name:["赵云","黄忠","马超","关羽"],
      timer:null
  }
  },
  methods: {
    startFn(){
      clearInterval(this.timer)
      this.timer=setInterval(()=>{
        this.word=this.name[parseInt(Math.random()*this.name.length)]
      },500)
    },
   endFn(){
      clearInterval(this.timer)
   }
}
};
</script>

<style>
* {
  margin: 0;
  padding: 0;
}

h2 {
  text-align: center;
}

.box {
  width: 600px;
  margin: 50px auto;
  display: flex;
  font-size: 25px;
  line-height: 40px;
}

.qs {
  width: 450px;
  height: 40px;
  color: red;
}

.btns {
  text-align: center;
}

.btns button {
  width: 120px;
  height: 35px;
  margin: 0 50px;
}
</style>